Geometry of the subgaussian body of an isotropic convex body

Apostolos Giannopoulos, Minas Pafis, Natalia Tziotziou

For a centered convex body $K\subset {\mathbb{R}}^n$, let ${\Psi }_2(K)$ denote the symmetric convex body whose support function is given by the ${\psi }_2$-norms of linear functionals on $K$. Th…